US2632844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic train control system for railroads having coded and noncoded track circuitterritory
Assignee: SPX Technologies Inc
•
Filing: 1946-10-09
•
Granted: 1953-03-24
•
Expires: 1966-10-09
Abstract
No abstract record available.
Inventors
- 👤 Hughson J Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:24
CPC Classifications
B; B61; B61L; B61L3/00; B61L3/16; B61L3/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2190505A
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US2233328A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-23 | 1956-09-22 | 1957-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-23 | 1960-09-22 | 1961-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-23 | 1964-09-22 | 1965-03-24 | $7700.00 | Window Closed / Lapsed |